Thickness-dependent electronic structure and interfacial behaviors of iron on faceted MgO(1 1 1) films

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• 作者：Mingshan Xue^a ; ^b ; ^{xuems04@mails.gucas.ac.cn} ; Qinlin Guo^b ; ^{qlguo@aphy.iphy.ac.cn}
• 刊名：Chemical Physics Letters
• 出版年：2012
• 出版时间：1 November, 2012
• 年：2012
• 卷：551
• 期：Complete
• 页码：92-95
• 全文大小：755 K

文摘

Based on the vital effect of the interfacial behaviors on tunneling magnetoresistance in Fe/MgO/Fe junctions, the thickness-dependent electronic structure of iron on MgO(1 1 1) films with {1 0 0} facets was investigated. The results illustrated that the chemical interaction at the interface of Fe and MgO films was rather weak. Instead, a upward band bending of MgO with 1.2 eV was obviously observed with the increase of Fe thickness. The particle size effect was responsible for these shifts of core levels owing to the three-dimensional growth of Fe. These results were further testified by the data from the lattice vibration in Fe-MgO system.